package sms

import "strings"

// NormalizeAU normalises a phone number to international AU format without a
// leading '+' or zero:
//
//	"+61423274487" -> "61423274487"
//	"0432374487"   -> "61423274487"
func NormalizeAU(phone string) string {
	s := strings.Map(func(r rune) rune {
		if r >= '0' && r <= '9' {
			return r
		}
		return -1
	}, phone)
	if strings.HasPrefix(s, "0") && len(s) >= 10 {
		s = "61" + s[1:]
	}
	return s
}